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| author | NeilBrown <neilb@suse.de> | 2006-03-27 01:18:04 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-27 08:45:01 -0800 |
| commit | 4588b42e9d0d0904a745c96cead66506c75bae21 (patch) | |
| tree | 203162f7e829da88e0bb81bc0c3f49d6f832f855 /drivers/md | |
| parent | 1be7892fffb45f6017494a88ff68fe84c6de26b4 (diff) | |
| download | linux-3.10-4588b42e9d0d0904a745c96cead66506c75bae21.tar.gz linux-3.10-4588b42e9d0d0904a745c96cead66506c75bae21.tar.bz2 linux-3.10-4588b42e9d0d0904a745c96cead66506c75bae21.zip | |
[PATCH] md: Update status_resync to handle LARGE devices
status_resync - used by /proc/mdstat to report the status of a resync, assumes
that device sizes will always fit into an 'unsigned long' This is no longer
the case...
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 686314f070a..a3ecaf8ed30 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -4044,7 +4044,10 @@ static void status_unused(struct seq_file *seq) static void status_resync(struct seq_file *seq, mddev_t * mddev) { - unsigned long max_blocks, resync, res, dt, db, rt; + sector_t max_blocks, resync, res; + unsigned long dt, db, rt; + int scale; + unsigned int per_milli; resync = (mddev->curr_resync - atomic_read(&mddev->recovery_active))/2; @@ -4060,9 +4063,22 @@ static void status_resync(struct seq_file *seq, mddev_t * mddev) MD_BUG(); return; } - res = (resync/1024)*1000/(max_blocks/1024 + 1); + /* Pick 'scale' such that (resync>>scale)*1000 will fit + * in a sector_t, and (max_blocks>>scale) will fit in a + * u32, as those are the requirements for sector_div. + * Thus 'scale' must be at least 10 + */ + scale = 10; + if (sizeof(sector_t) > sizeof(unsigned long)) { + while ( max_blocks/2 > (1ULL<<(scale+32))) + scale++; + } + res = (resync>>scale)*1000; + sector_div(res, (u32)((max_blocks>>scale)+1)); + + per_milli = res; { - int i, x = res/50, y = 20-x; + int i, x = per_milli/50, y = 20-x; seq_printf(seq, "["); for (i = 0; i < x; i++) seq_printf(seq, "="); @@ -4071,10 +4087,12 @@ static void status_resync(struct seq_file *seq, mddev_t * mddev) seq_printf(seq, "."); seq_printf(seq, "] "); } - seq_printf(seq, " %s =%3lu.%lu%% (%lu/%lu)", + seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? "resync" : "recovery"), - res/10, res % 10, resync, max_blocks); + per_milli/10, per_milli % 10, + (unsigned long long) resync, + (unsigned long long) max_blocks); /* * We do not want to overflow, so the order of operands and @@ -4088,7 +4106,7 @@ static void status_resync(struct seq_file *seq, mddev_t * mddev) dt = ((jiffies - mddev->resync_mark) / HZ); if (!dt) dt++; db = resync - (mddev->resync_mark_cnt/2); - rt = (dt * ((max_blocks-resync) / (db/100+1)))/100; + rt = (dt * ((unsigned long)(max_blocks-resync) / (db/100+1)))/100; seq_printf(seq, " finish=%lu.%lumin", rt / 60, (rt % 60)/6); |